It can achieve the aim that reducing pipe line decreasing invest and link,by using dill hole technology in opening inclined shaft process.

 
  • 斜井開(kāi)拓中,采用鉆孔技術(shù)排水,可大大縮短管路,減少投資,減少環(huán)節,達到長(cháng)期節電降耗的目的。
今日熱詞
目錄 附錄 查詞歷史
国内精品美女A∨在线播放xuan